When I am creating a bill and saving it and
then giving issue output to and then header preview, the system does not
respond. Should I maintain condition records? Where and how
to maintain?

For getting any output either by print, Fax, or
any media you have to do output determination. output determination is
also carried by Condition techniques. The detail procedure for Output Determination
is :

OutPut Determintaion :

Output is a form of media from your business to
one of its business partners or it can be within the organization. The
output can be sent to any of the partners defined in the document. Outputs
are usually in the form of Order Confirmations, Freight List, Delivery
Notes, Invoices & Shipping Notifications. Determining form of output
is output determination.

It contains: Sales Orgnisation, Customer, Partner
Function (The abbreviated form of the name that identifies the Partner)
(During output determination, the system determines the recipient of the
output from the master record for the specified partner function. In this
field, you can explicitly specify a recipient that will override the standard
partner. There must also be a master record for the partner that is specified
explicitly.), Medium, Time & Language.}